AOZ8208 Eight-line TVS Diode Array General Description

AOZ8208 Eight-line TVS Diode Array  General Description
AOZ8208
Eight-line TVS Diode Array
General Description
Features
The AOZ8208 is a transient voltage suppressor diode
array designed to protect data lines from high transient
conditions and ESD. This state-of-the-art device utilizes
AOS leading edge Trench Vertical Structure [TVS]2 ™
technology for superior clamping performance.
z ESD protection for high-speed data lines:
This device incorporates eight TVS diodes in a single
package. During transient conditions, the TVS diodes
direct the transient to ground. They may be used to
meet the ESD immunity requirements of IEC 61000-4-2,
Level 4 (±15kV air, ±8kV contact discharge).
– Exceeds: IEC 61000-4-2 (ESD) ±15kV (air),
±15kV (contact)
– IEC61000-4-5 (Lightning) 5A (8/20μS)
– Human Body Model (HBM) ±20kV
z Trench Vertical Structure [TVS]2 ™ based technology
used to achieve excellent ESD clamping performance
z Small package saves board space
z Low insertion loss
z Protects eight unidirectional I/O lines
The AOZ8208 is RoHS compliant. The DFN-8 package
is rated over a -40°C to +85°C ambient temperature
range.
z Low clamping voltage
The very small DFN-8 1.8 x 1.2 x 0.55mm package
makes it ideal for applications where PCB space is a
premium. The small size and high ESD protection
makes it ideal for protecting high speed video and data
communication interfaces.
Applications
z Low operating voltage: 5.0V
z Green product, Pb-free
z Portable handheld devices
z Keypads, data lines
z Notebook computers
z Digital Cameras
z Portable GPS
z MP3 players
Typical Applications
Pin Configuration
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
1
8
2
7
GND
6
4
5
Top View
Unidirection Protection of Eight Lines
Rev. 1.0 March 2010
3
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Page 1 of 8
AOZ8208
Ordering Information
Part Number
Ambient Temperature Range
Package
Environmental
AOZ8208DI-05
-40°C to +85°C
DFN-8
Green Product
RoHS Compliant
AOS Green Products use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.
Absolute Maximum Ratings
Exceeding the Absolute Maximum ratings may damage the device.
Parameter
Rating
Peak Pulse Current (IPP), tP = 8/20µs
5A
Storage Temperature (TS)
-65°C to +150°C
ESD Rating per IEC61000-4-2, Contact(1)
ESD Rating per IEC61000-4-2,
±15kV
Air(1)
±15kV
ESD Rating per Human Body Model(2)
±20kV
Notes:
1. IEC 61000-4-2 discharge with CDischarge = 150pF, RDischarge = 330Ω.
2. Human Body Discharge per MIL-STD-883, Method 3015 CDischarge = 100pF, RDischarge = 1.5kΩ.
Maximum Operating Ratings
Parameter
Rating
Junction Temperature (TJ)
-40°C to +125°C
Electrical Characteristics
TA = 25°C unless otherwise specified.
Symbol
Parameter
IPP
Maximum Reverse Peak Pulse Current
VCL
Clamping Voltage @ IPP
VRWM
Working Peak Reverse Voltage
IR
Maximum Reverse Leakage Current
VBR
Breakdown Voltage
IF
Forward Current
VF
Forward Voltage
PPK
Peak Power Dissipation
CJ
Capacitance @ VR = 0 and f = 1MHz
Device
Device VRWM (V)
Marking
Max.
AOZ8208DI-05
Rev. 1.0 March 2010
D
5
Diagram
I
IF
VCL VBR VRWM
V
IR VF
IT
IPP
VBR (V)
Min.
IR (µA)
Max.
VF (V)
Typ.
6.0
0.1
0.85
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VCL Max.
IPP = 1A IPP = 5A IPP = 12A
7.0
8.0
9.0
CJ (pF) CJ (pF)
Typ.
Max.
10
12
Page 2 of 8
AOZ8208
Typical Performance Characteristics
Clamping Voltage vs. Peak Pulse Current
1.20
10
1.00
0.80
0.60
0.40
0.20
0.00
(tperiod = 100ns, tr = 1ns)
(f = 1MHz, T = 25°C)
Clamping Voltage, VCL (V)
Normalized Input Capacitance
Typical Variation of CIN vs. VR
8
6
4
2
0
0
1
2
3
4
5
0
2
Input Voltage (V)
4
6
10
8
12
Peak Pulse Current, IPP (A)
Forward Voltage vs. Forward Current
5
0
Insertion Loss (dB)
Forware Voltage (V)
I/O – Gnd Insertion Loss (S21) vs. Frequency
(tperiod = 100ns, tr = 1ns)
8
6
4
2
-5
-10
-15
-20
0
0
2
4
6
-25
10
8
12
1
10
Forward Current (A)
100
1000
10000
Frequency (MHz)
Crosstalk (I/O–I/O) vs. Frequency
0
Insertion Loss (dB)
-20
-40
-60
-80
-100
-120
1
10
100
1000
10000
Frequency (MHz)
Rev. 1.0 March 2010
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Page 3 of 8
AOZ8208
Applications Information
Device Connection for Protection of Eight
Unidirectional Data Lines
1
2
3
4
5
6
7
8
These devices are designed to protect up to eight
unidirectional data lines. The device is connected as
follows.
GND
z Unidirectional protection of eight I/O lines is achieved
by connecting pins 1 through 8 to the data lines.
The ground connection should be made directly to the
ground plane for best results. The path length is kept
as short as possible to reduce the effects of
parasitic inductance in the board traces.
Circuit Diagram
I/O1
I/O2
I/O3
I/O4
1
8
7
2
GND
Circuit Board Layout Recommendations for
Suppression of ESD
Good circuit board layout is critical for the suppression of
ESD induced transients. The following guidelines are
recommended:
z Place the TVS near the input terminals or connectors
3
6
4
5
I/O5
I/O6
I/O7
I/O8
Protection of Eight Unidirection Lines
to restrict transient coupling.
z Minimize the path length between the TVS and the
protected line.
z Minimize all conductive loops including power and
ground loops.
z The ESD transient return path to ground should be
kept as short as possible.
z Never run critical signals near board edges.
z Use ground planes whenever possible.
Rev. 1.0 March 2010
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Page 4 of 8
AOZ8208
Package Dimensions, DFN 1.8 x 1.2, 8L
D1
D
b
e
D2
E
E1
L
Pin 1
Marking
Pin 1 ID
(C0.2x45°)
TOP VIEW
BOTTOM VIEW
A
SIDE VIEW
A3
A1
Dimensions in millimeters
RECOMMENDED LAND PATTERN
0.20
1.00
0.20
0.20
0.20
0.20
1.00
0.30
0.40
0.20
Symbols
A
Min.
0.50
A1
A3
b
0.00
Nom.
0.55
Symbols
A
Min.
0.020
—
0.05
0.152 Ref.
0.15
0.20
0.25
A1
A3
b
0.000
D
D1
1.75
0.95
1.85
1.05
D
D1
0.069
0.037
D2
E
E1
1.15
0.25
0.200 Ref.
1.20
1.25
0.30
0.35
D2
E
E1
0.045
0.010
0.008 Ref.
0.047 0.049
0.012 0.014
e
L
0.20
0.40 BSC
0.25
0.30
e
L
0.008
0.016 BSC
0.010 0.012
1.80
1.00
Max.
0.60
Dimensions in inches
Nom.
0.022
Max.
0.024
—
0.002
0.006 Ref.
0.006 0.008 0.010
0.071
0.039
0.073
0.041
0.30
Notes:
1. Controlling dimension is millimeter, converted inch dimensions are not necessaily exact.
2. Warpage shall not exceed 0.10mm.
3. Marking is for package orientation reference only.
Rev. 1.0 March 2010
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Page 5 of 8
AOZ8208
Tape and Reel Dimensions, DFN 1.8 x 1.2, 8L
Carrier Tape
P2
P1
D1
D0
E1
K0
E2
E
B0
Ref. 5°
P0
T
A0
Feeding Direction
UNIT: mm
Package
DFN 1.8x1.2
A0
1.32
±0.05
B0
1.92
±0.05
K0
0.75
±0.05
D0
ø1.55
±0.05
D1
E
ø0.55
8.00
±0.05 +0.3/-0.1
E1
1.75
±0.1
E2
3.50
±0.05
P0
4.00
±0.1
P1
4.0
±0.1
P2
2.0
±0.05
T
0.25
±0.05
W1
Reel
S
K
N
M
G
R
H
W
UNIT: mm
Tape Size Reel Size
8mm
ø178
M
N
W
ø178.0
±1.0
ø60.0
±1.0
11.80
±0.5
W1
H
9.0
ø13.0
±0.5 +0.5/-0.2
S
K
2.40 10.25
±0.10 ±0.2
G
R
ø9.8
—
Leader / Trailer & Orientation
Trailer Tape
300mm Min.
Rev. 1.0 March 2010
Components Tape
Orientation in Pocket
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Leader Tape
500mm Min.
Page 6 of 8
AOZ8208
Package Marking
AOZ8208DI-05
(DFN 1.8 x 1.2, 8L)
D
Assembly Lot Code
Week and Year Code
Part Number Code
Rev. 1.0 March 2010
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Page 7 of 8
AOZ8208
Revision History
Revision
Rev. 1.0
Revised Item
Initial release
This data sheet contains preliminary data; supplementary data may be published at a later date.
Alpha & Omega Semiconductor reserves the right to make changes at any time without notice.
LIFE SUPPORT POLICY
ALPHA & OMEGA SEMICONDUCTOR PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL
COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS.
As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant into
the body or (b) support or sustain life, and (c) whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of
the user.
Rev. 1.0 March 2010
2. A critical component in any component of a life
support, device, or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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